ANK72
Mechanical
- Feb 21, 2004
- 21
Hello all,
Can someone please advise what calculation procedure to use for evaluating stresses at nozzle attachments larger than half the vessel diameter?
There is an existing shell & tube heat exchanger designed to ASME VIII Div 1. It will experience uplift in a seismic event thus causing dynamic loads on the nozzles.
The shell is made of DN500, XS SMLS pipe (508mm OD, 12.7mm thk) and the nozzle neck is DN250, XS SMLS pipe (273mm OD, 12.7mm thk).
So, effectively this is a ‘branch-to-header’ type of arrangement and I’m sure some of you have come across a similar scenario before.
My understanding is that the given D/d ratio is outside the scope of PD5500, Bijlaard and WRC107. Can you please recommend an alternative procedure?
The nozzle loads (both static and dynamic) have been established from an AutoPIPE stress analysis.
Many thanks
Can someone please advise what calculation procedure to use for evaluating stresses at nozzle attachments larger than half the vessel diameter?
There is an existing shell & tube heat exchanger designed to ASME VIII Div 1. It will experience uplift in a seismic event thus causing dynamic loads on the nozzles.
The shell is made of DN500, XS SMLS pipe (508mm OD, 12.7mm thk) and the nozzle neck is DN250, XS SMLS pipe (273mm OD, 12.7mm thk).
So, effectively this is a ‘branch-to-header’ type of arrangement and I’m sure some of you have come across a similar scenario before.
My understanding is that the given D/d ratio is outside the scope of PD5500, Bijlaard and WRC107. Can you please recommend an alternative procedure?
The nozzle loads (both static and dynamic) have been established from an AutoPIPE stress analysis.
Many thanks
